How to make a mount run up hills?

[FuzzyAcornIndustries]

I'm working on a custom mount. Right now, I have it mimic most everything a horse can but I cannot figure out how to get the mount to travel up one block inclines like a horse can.

 

I cannot find anything in the related Horse, EntityLiving, or PlayerEntity classes. Where is this feature located? Or what might it be called in code so I could run a search for it.

[Krevik]

Try looking for stepHeight

[FuzzyAcornIndustries]

Thank you! I knew it was something absolutely simple. I just didn't think to check the horse constructor.